On finding gravitational waves from anisotropies of the Cosmic Microwave Background

Yiran Wang

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arXiv · 2510.24005

On finding gravitational waves from anisotropies of the Cosmic Microwave Background

Yiran Wang

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Abstract

The integrated Sachs-Wolfe (ISW) effect describes how photons are gravitationally redshifted, producing anisotropies in the Cosmic Microwave Background. We study the inverse problem and show that primordial gravitational perturbations, in particular their polarizations in the transversally traceless (TT) gauge can be identified from the local observation of the ISW effect.

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Yiran Wang. 2025-10-28. On finding gravitational waves from anisotropies of the Cosmic Microwave Background. https://arxiv.org/abs/2510.24005

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